Valve for pneumatic tires



R. s BURN VALVE FOR PNEUMATIC TIRES Filed Oct. 1 9. 1922 $4, ENGLAND.

VALVE F833 FNEUMIATIC iETIIEL-ES.

Application filed October 9, 1922.

1 all 107mmz't may concern:

Be it known that l, ltosinsoN Solarium lions, a subject of the siting ofGreat Britain, of The Poplurs, il ylde Green, Birmingham, England, haveinvented certain new and useful lmprovements in and Relating to Valvesfor Pneumatic Tires, of which the following is a specification.

This invention relates to improvements in wives for pneuniati tires, andhas for its objeeu to provide an improved hood or cap by which leakageof air from the valve is entirely prevented, and the access of we terother foreign matter to the valve rendered impossible,

lVith this object in view it has been proed to employ closed hood or capmen which is three-fled upon the valve, and e t its open end a -esilientwasher which rates with a rim-nut when the hood ineniber is screwed downthereon, a further resilient Washer being in some cases provided on therim-nut to cooperate with the first resilient Washer.

There is, however, a considerable tendency "for the resilient Washer onthe hood member to ford the screw-thread on the valve as the inenilgieris screwed down, and Where a urther Washer is provided on the rim-nutthe engagement oi the two resilient Washers causes a tearing or distortin of the faces of the \mshers, and, in use, the joint soon ceeses to heairtiejht.

ln my invention these dil'lic I overcome, and my invention es"coinprises a metal hood member hsvi. g at its open end a rigid smoothsurface which is adopted cooperate, as the hood screvvec down on thevalve, With an upstanding no leakage even it the latter detective. At t1e same time the valve is completely protected against Wat r, dust, orother foreign matter.

I prett er an internally coned rigid surface on the hood and a tepered,or conical, resilient washer on the upper face of the rininut, ant thispreferred embodiment is illus trated in the appended drawings in WhichSerial No. 533,262.

Figure l is a perspective View of the cap and rim-nut.

Figure 2 is an elevation in section.

Figure 3 is elevation in section shoW ins the cap and rin'i-nut upon avalve.

In the drawings, a is the cap, of brass suitable metal, closed at theupper provided with an external hexagotion 5 or with Wing port-ions bywhich it may be rotated. An internal thread 0 near the lower end isadapted to receive the thread on a valve, and in the lower end of thecap is formed a tapered or conical recess (Z as shov section in Fig. 2,

rini-nut agonal or recess on its upper face i-i'ibher or otherresihentconiit is screwed down upon the valve body it shuts again t the rim, andthe cap a screwed down behind it until the recess (Z receives the washerf the Washer 7' on the upper face of the rim-nut there is 1 possibilityof the Washer foulingthe thread on the valve body as the ut is screwedthereon, while the cooperaden of the recess d With the washer f as thecap is screwed down causes the Washer to be compressed around the valvebody and ensures a perfectly airtight joint.

I claim: ln valves for pneumatic tires the combination of a cap memberclosed at the upper end and hav' gen interr .l thread to i a cu hread onthe valve body, tapered re at the opei. lowe -nd of the cap inenil'ierentend Without h ..l or step from said open end LO the inter l bore ofthe cap,e rim-nut 5 body below the cap,rand a r carried on t;

T so that the i c t sat iers and'compresses the upper part the resilientWasher snugly ar und tne valve body to form an air-tight jointtherewith.

In testimony whereof I etlix my signature.

noeinsoiv SCALING BURN.

